CELL STRUCTURES AND FUNCTION
BIO MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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higher concentration of hydrogen ions than hydroxide ions
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higher concentration of hydroxide ions than hydrogen ions
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equal concentration of hydrogen ions and hydroxide ions
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None of the above
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Detailed explanation-1: -For any neutral solution at 25oC, each of these ions has a concentration of 1.0×10−7M. An acidic solution is a solution in which the concentration of hydrogen ions is greater than the concentration of hydroxide ions. For example, hydrogen chloride ionizes to produce H+ and Cl− ions upon dissolving in water.
Detailed explanation-2: -At pH 7, the substance or solution is at neutral and means that the concentration of H+ and OH-ion is the same. If pH < 7, the solution is acidic. There are more H+ than OH-in an acidic solution.
Detailed explanation-3: -An acidic solution is one in which the hydrogen ion concentration is greater than the hydroxide ion concentration; in other words, the hydrogen ion concentration is greater than 1 X 10-7 M, and the hydroxide ion concentration is less than 1 X 10-7 M. In terms of pH, an acidic solution has a pH less than 7.
Detailed explanation-4: -Bases increase the number of hydroxide ions (there are more hydroxide ions than hydrogen ions) and the resulting solution is said to be basic or alkaline.